How can I be UPG in a non-category race?

I recently participated in all four Specialized Roval Climbing Challenges, and finished the Road to Sky crossing the finish line as number 12. It is not registered though - instead it says UPG… What does that mean?:thinking: The other three challenges I finished with approximately (or more or less exactly) the same average w/kg as Road to Sky: 3,7 w/kg.
My race category is set to B, but the Roval Climbing Challenge is not a race as such, and you don’t register into categories…
What is that UPG about, and why am I not listed as finisher with my finishing result - just like in the three earlier races???:thinking::thinking:

There’s a thread on this issue: